▎ 摘　　要

Reduced graphene oxide (rGO) has been studied as a possible substitute for graphene in many applications because it is cheaper and easier to prepare than graphene. RGO with low reduction degree has good hydrophilicity and can be stably dispersed in water. These properties are conducive to the preparation of hydrophilic composites. Here, the method of microwave reduction of GO suspension to prepare rGO with low reduction degree was studied. By controlling the reduction time, the rGO samples with different reduction degrees are prepared. After studying the characterization data of rGO with different reduction degrees, we propose the hypothesis of the reduction pathway of GO suspension, that is, the oxygen-containing groups on the surface of GO sheet are reduced first. FTIR, TGA and XPS data verify this hypothesis and are consistent with the simulation results. Therefore, the low reduction degree rGO has a large-area conjugated structure similar to graphene and also has good hydrophilicity due to the residual oxygen-containing groups on the periphery of the rGO sheet. This structure provides convenience for its composite with hydrophilic materials. In sum, the microwave reduction of GO suspension provides a simple method for researchers to prepare rGO with low reduction degree.